<!DOCTYPE html>
<html lang="en" xmlns:v-on="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="UTF-8">
    <title>事件以及方法</title>
</head>
<body>
    <div id="app">
        {{yy}}
        <button v-on:click="add">点我变大</button>
    </div>

<script src="../node_modules/vue/dist/vue.js"></script>
<script>
    let app = new Vue({
        el: "#app",
        data: {
            yy: 5
        },

        methods:{
            add(){
                this.yy++;
            }
        }


    })


</script>
</body>
</html>